//创建一个MultiSphere驱动类，其main方法实例化并返回一些Sphere对象。
public class MultiSphere
{
  public static void main(String []args)
  {
   Sphere example = new Sphere(10);

   System.out.println("the diameter is :"+example.getD());
   System.out.println("the sufacearea is :"+example.surfacearea());
   System.out.println("the volume is :"+example.Volumearea());
   }
}   
